<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
欢迎${user}
<#if (age<=17)>小哥
<#elseif (age>=31)>先生
<#else >hahaha
</#if>登录<br>



</body>
</html>